urethrogram is a diagnostic radiological imaging study designed to visualize the lumen and structural anatomy of the urethra using radiopaque contrast media and fluoroscopy. It is primarily utilized in urology to diagnose and map the length and severity of a urethral stricture, evaluate for urethral trauma or disruption, and identify anatomical outpouchings like a urethral diverticulum. The procedure is most commonly performed in a retrograde fashion (Retrograde Urethrogram or RUG), where contrast is injected at the meatus against the normal flow of urine to distend the anterior urethra. It can also be performed as an antegrade or voiding study (Voiding Cystourethrogram or VCUG), where contrast is instilled into the bladder and imaged as the patient urinates, which is superior for evaluating the posterior urethra and detecting vesicoureteral reflux. A urethrogram is distinguished from cystourethroscopy, which involves direct endoscopic visualization of the urethral mucosa rather than radiographic imaging of its contour.
Noun-forming suffix — “a record, picture, or tracing”
The word entered English in the 1910s as urethrogram (noun), combining the anatomical root for the urethra with the standard radiological suffix following the advent of contrast radiography. The root ourethra (“urethra”) connects urethrogram to the entire urethr- family: urethritis (urethra + inflammation → inflammation of the urethra), urethroplasty (urethra + surgical repair → surgical reconstruction of the urethra), and urethrotomy (incision into the urethra). The suffix -gram is highly productive in medical imaging terminology, appearing in cystogram, angiogram, and electrocardiogram.
🔀 ALIASES / ALTERNATE TERMS
Urethrography(noun form — the act or process of performing the imaging study; e.g., “retrograde urethrography was performed”)
Retrograde Urethrogram (RUG)(clinical synonym — the most common technique where contrast is injected retrogradely at the meatus; standard for anterior urethral strictures)
Voiding Cystourethrogram (VCUG)(related clinical entity — evaluates both the bladder and the urethra during the micturition phase; standard for posterior urethral valves or reflux)
Antegrade urethrogram(related clinical entity — contrast is introduced via a suprapubic cystostomy tube and flows distally with urine)
Dynamic Retrograde Urethrography(clinical descriptor — performed under continuous fluoroscopy to assess urethral distensibility in real-time)
Pericervical Urethrogram(anatomic subtype — specialized imaging sometimes used in urogynecology for female urethral diverticula)
🔗 RELATED TERMS
Cystogram — imaging of the bladder; often performed concurrently with a urethrogram (cystourethrogram) but focuses on bladder pathology (e.g., rupture, fistula) rather than the urethra.
Cystourethroscopy — direct endoscopic visualization of the urethra and bladder; provides mucosal detail and allows for concurrent intervention, whereas a urethrogram provides a roadmap of stricture length and location.
Urethral stricture — [N35.x] the most common pathological indication for a RUG; a narrowing of the urethral lumen due to scar tissue from trauma, infection, or instrumentation.
Urethral diverticulum — N36.1 an outpouching of the urethral wall, more common in females, often diagnosed via specialized voiding or positive-pressure urethrography.
Fluoroscopy — the real-time X-ray imaging modality used to capture the dynamic flow of contrast during a urethrogram.
Urethroplasty — CPT 53410-53430 the definitive surgical reconstruction of the urethra, for which a urethrogram serves as the essential preoperative planning tool.
Cystography, minimum of 3 views, radiological supervision and interpretation
⚠️ Coding Note: In the inpatient profee setting, billing for a urethrogram is typically split between the surgical injection component and the radiological supervision and interpretation (RS&I). If the urologist performs the injection (51610) and the hospital radiologist reads the film, the urologist bills only 51610. If the urologist both injects the contrast and writes a formal, distinct radiological interpretation report in the chart, they may bill 51610 plus 74450-26 (Professional Component). Be cautious of NCCI edits: if a retrograde urethrogram is performed in the OR immediately prior to a definitive procedure (like a urethroplasty or cystourethroscopy) simply to confirm anatomy, the injection (51610) is often bundled into the primary surgical code and should not be billed separately unless it is a truly distinct diagnostic service (requiring modifier -59 or -XU). Always ensure the ICD-10-CM code specifies the exact location of the stricture (e.g., bulbous, membranous, anterior) if known, as unspecified codes (N35.9) frequently trigger payer denials.